Quoin.



ATN FFTCE.

EDWARD J. CASEY, OF SPRINGFIELD. MASSACHUSETTS.

QUOIN.

Application filed March 13. 1909.

ments in Quoins, of which the following is a full, clear, and exactdescription.

The object of this invention is to provide locking devices in a quoinwhich will be automatically operative to prevent the endwise movement ofone of the wedge-shaped quoin members relatively to the other from theeffects of vibration or other cause, and which is susceptible of beingmost readily placed in a position of disengagement to permit of apurposed movement of the quoin members one relatively to the other foreither increasing their transverse distention for locking up or fordiminishing such distention for unlocking the form.

The invention consists in quoin members having structural features andappurtenances all substantially as hereinafter described in conjunctionwith the accompanying drawings and set forth in the claims.

In the drawings :--Figure l is a side elevation of the quoin; Fig. is aplan view of the member of the quoin which in Fig. l is represented asthe uppermost one shown as inverted; Fig. 3 is a similar view to Fig. 1but showing thelocking device as forced to its unlocking position by theaction of the quoin operating key; Fig. 4 is a cross sectional View ofthe two-part quoin as taken on line .l*l, Fig.o-1, the locking devicebeing shown as in its locking position; Fig. 5 is a cross sectionalviewv similar to Fig. 1,- .but showing the locking device as forced toits unlocking position by the key.

Similar characters of reference indicate corresponding parts in all ofthe views.

In the dra\vings,A and B represent the pair of quoin members made of theusual wedgeshape with theircoacting surfaces-so inclined to their backsor outer wallsthat irrespective oi how much or little the one member maybe slid endwise along the other their outer opposite surfaces will bealways in parallelism although extended or contracted as the case maybe.

The bodies of the quoin members are, as somewhat usual in these devices,made each with a central rib a, flange like side portions b'constructedwith rack teeth d at their facing surfaces, in longitudinal arrangement;

Specification of Letters Patent.

Patented Dec. 7. moo.

Serial No. 483,164.

and an end of each/quoin meanber beyond the series of rack teeth islaterally wi .lened, or made more solid as indicated at llach quoinmember has at the front side of its central rib and between the latterand the rack teeth d a longitudiral recess or groove It. Such groove inone of the quoin members as here represented the upper one A beingendwise ctmtinuous, as especially represented at /I. through the widenedend portion of the quoin meml'ier.

1) represents a detent device which is eon neeted with and carried byone of the quoin members, normally operative by its lateral reactiontoengage'in the rack teeth of the other quoin member and susceptible ofbeing by a transverse pressure thereagainst, moved free from its racktooth engagement.

As specifically shown this detcnt device is made in the form otaT-shaped spring plate. as shown facewise in Fig. 1, the same having itslongitudinal member disposed, and confined by rivets, in the grooveextension or recess [L2 of the quoin member A, $0 and having its endportion which comprises the upwardly extending projection normallylaterally deflected by being made with a bend or curvature indicated ata? in Fig. 2, so that normally such extremity comprising theopposit'elyextending projections are out-' wardly otl'side from the line of theaforesaid grooves it, h, and have their disposition within the widths ofthe opposing set of rack teeth for engagement therein,-it being herementioned that when the detent device is in its rack teeth engagement itforms an interlocking element or clog between the rack teeth of the one.quoin i'nei'nber and the rack teeth of the other. as well as having a 9connection by the riveting z' with the one quoin member A.

AS the device is considered with reference to the view thereof, Fig. 1,it might be stated that a practically etlicient device for the purposeof this invention would be provided if the upper projection, especiallydesignated by the numeral 8, were omitted; but for increased stabilityand strength of the locking device the dual provision of transverseprojections to the springdetent'. plate is preferred. The quoin, forinstance, may be placed with its members in juxtaposition butnon-distended as to the transverse aspect of the double wedge-termeddevice 1, and placed between the chase and the form, at which time thespring detenthy its outward reactionwill engage the rack teeth; but onthe insertion of the pinion ended key y into its engagement with theopposed racks, the endwise thrust of the key for bringing it to phi efor its engagement with the racks will crowd the detent plate to itsstraight condition as represented in Fig. 3

and, of course, when the so that its projecting); or projections will beoffside from the rack teeth and occupying positions in the groove orgrooves h, thereby ceasing to constitute any obstruction to the relativemovement of the quoin member;

quoin is to be unlockedland relatively moved to be contracted by the keythe end thrust of the key against the detent plate again establishes thecondition, as before explained, for freedom of movement of the doublewedge-like parts.

I claim 1. A quoin comprising relatively movable Wedge-shaped membershaving opposed raclc teeth at their sides and each having a longitudinalway inside of its rack teeth, one of the fllOlll membershaving a springplate secured to its one end portion thereto, having I I l l a l l I Iits outer extremity laterally deflected and provided with oppositelyextended projections, normally operative by the" spring reaction of saidplate to engage opposite teeth of the quoin members and adapted by theengagement sidewise thereagainst of the quoin operating key to betransversely moved out of its rack tooth engagements and to be free formovement in the said longitudinal ways.

A wedge-shaped members having opposed rack teeth at their sides, one ofsaid members having a longitudinal groove inside of its rack teeth andhaving its end portion beyond the series of rack teeth widened andhaving a recess through said widened portion continuous with said grooveand the other quoin membe also having a longitudinal groove inside itsrack teeth, a T-shaped spring platehaving its longitudinal memberdisposed and confined in said recess in the widened end part of the onequoin member and having its end portion comprising oppo sitely extendingprojections normally laterally deilccted from the plane of the groove,-

and said recess adapted, when the quoin members are in operativerelations, to engage in the opposed rack teeth thereof and adapted bythe pressure in an inward direction sidevvise thereagainstto be forcedto the coinciding plane of said longitudinal grooves.

Signed by me at Springfield, Mass, in presence of two subscribingWitnesses.

EDW. J. CASEY, Vi itnesses M. S. BnLLows,

R. DRISCOLL.

quoin comprising relatively movable

